up previous next

IsPrime

Syntax

IsPrime(N:INT):BOOL
    

Summary

prime integer test

Description

This function determines whether a small integer is prime. The range of permitted values for N is the same the range of permitted values for the NextPrime function: on most platforms N <= 45000 should work fine, on some platforms considerably larger values will work. For N greater than the limit an error is raised.

example

    
IsPrime(32003);
TRUE
-------------------------------
IsPrime(10^100);
ERROR: IsPrime: number too large
CONTEXT: Return(Error("IsPrime: number too large"))
-------------------------------
        
    

See Also